NOTES November 30

Euphorbiaceae (Spurge family, Poinsettia family)

Euphorbia: produces a cyathium as an inflorescence; "false flower" or "pseudanthium, a cup like structure formed of fused bracts, within which are several male flowers, each reduced to a single stamen, and a single female flower, represented by a 3-carleed ovary, on a pedicel. E. pulcherima is the Xmas poinsettia.

Hevea: H. brasiliensis is a tropical S. American tree, source of rubber

Ricinus communis: "castor bean", contains toxins. Source of the toxin "ricin". Castor oil formerly used as a purgative, and as punishment for misbehaving children.

Manihot esculenta: Source of tapioca, and cassava, important as starch sources in Latin America.

Ranunculaceae (Buttercup family)